
Avaliação de Matemática - 2º Trimestre
Authored by ANA SANTOS
Mathematics
11th Grade

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23 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
Usando a definição de logaritmo: log_a b = x ↔ a^x = b, calcule: a) log_3 81 = b) log 0,1 = c) log_2 64 =
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
Sabe-se que log_a 49 = 2. Calcule a.
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3.
OPEN ENDED QUESTION
3 mins • 1 pt
Sabe-se que log_3 x = −3. Calcule x.
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
Usando a propriedade operatória “logaritmo de um produto”, calcule: log 2 + log 5
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
Sabendo que log 2 ≅ 0,30 e log 3 ≅ 0,47, então quanto vale log 12, aproximadamente?
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6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual a função inversa de y = 7/x?
y = log x
y = log x/7
y = log_7 x
y = log (7x)
y = x/7
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Aplicando as propriedades de consequência dos logaritmos, é possível dizer que:
log 100 = 3
10^log 5 = 5
log 0,01 = 2
log 10^-2 = 2
log 1 = 10
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